<template>
  <view>
    <view class="goods-list">
      <view v-for="(item,i) in goodsList" :key="i" @click="gotoDetail(item)">
        <my-goods :item="item"></my-goods>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        queryObj: {
          query: '',
          cid: '',
          pagenum: 1,
          pagesize: 10
        },
        goodsList: [],
        total: 0,
        //节流阀
        isloading:false
        
      };
    },
    onLoad(options) {
      this.queryObj.query = options.query || ''
      this.queryObj.cid = options.cid || ''
      this.getGoodsList()
    },
    methods: {
      // 获取商品数据的方法
      async getGoodsList(cb) {
        // 打开节流阀
        this.isloading = true
        const { data: res } = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
        // 关闭节流阀
        this.isloading = false
        // 只要数据请求完毕，立即按需调用cb回调函数
        cb && cb()
        if (res.meta.status !== 200) return uni.$showMsg()
        this.goodsList = [...this.goodsList,...res.message.goods]
        this.total = res.message.total
      },
      gotoDetail(item){
        uni.navigateTo({
          url:"/subpkg/goods_detail/goods_detail?goods_id=" + item.goods_id
        })
      }

    },
    // 上拉加载
    onReachBottom() {
      
     if(this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('到底了！！！')
      // 判断节流阀的状态,如果正在请求其他的数据直接return出去 不在发起额外的请求
      if(this.isloading) return
      // 让页面值自增+1
      this.queryObj.pagenum ++
      this.getGoodsList()
    },
    // 下拉刷新
    onPullDownRefresh(){
      // 先重置关键数据
      this.queryObj.pagenum = 1
      this.total = 0
      this.isloading = false
      this.goodsList = []
      // 再发起请求
      this.getGoodsList(() => uni.stopPullDownRefresh())
    }
    
  }
</script>

<style lang="scss">

</style>
